Los Angeles daily herald., 1887-05-19

aud vines per day-vines in an advanced
stage OF vegetation. He may apply as
many pounds of sulphur per day With
other instruments, but it can not thus
be so evenly distributed nor cover the
same area.
"The powdered sulphur should be APP
piled so as to lodge as much as possible
on aud near the growing parts OF the
vine. This secures q dense sulphur va
por in direct contact with the diseased
organs. Sulphur on the old stump. or
even on the surface OF the ground, will
destroy the oidium, but larger quan.
tity would be required.
"Sulphur falling on the ground is by
| no means lost, but lesser quantity will
answer If lodged on the leaves and
branches 1t has been stated that sui.
phur falling TO the earth is lost by its
effect being Immediately neutraiized.
The sulphurous acid formed Is neutral.
ID, but the vapor of sulphur-the
| active disinfectant--is not neutralized;
nor is the effect of the sulphur lost, ex-
cept as it be covered mp and hid from
the sun and air.
THE TIMf TO APPLY THE REMEDY.
"The simplest rule as to the time for
applying sulphur is: Treat the vineyard
whenever the disease makes its appear
ance. But, if we desire to apprehend
even its introduction, which is the gen.
eral custom in California. the first ap-
plication should be made at or about
the time of Towering. as at this period
| the disease is apt to attack the delicate
organs of fructitication and render the
vine infertile. Altogether the most
favorable results have been obtained by
sulphuring at the time of blossoming.
This, too, is one OF the methods of COM
batting couture, trouble which will be
treated later on. Young vines DO not
require so frequent sulphuripg nor so
great quantity as vines in full bearing.
The former should be suiphured whep
the shoots attain length of few
inches; and again, later or, If the oidium
makes its appearance. Bearing vines
should, 10 addition TO the treatment at
blossomipg, receive Il second application
from the lirst 10 the middle of June, and
again, later On, ii the disease makes its
appearance.
'The quantity used at each applica-
ton may vary with the number OF vines
per acre, and shonld be governed some
what by the susceptibility Of the variety
as before explained. Less is needed for
the first than fer subsequent applica-
tions, when the vines attain full proper.
tions. The quantity commonly used in
California for old vines subject 10 oidium
is about eight pounds per acre for the
first treatment, and from twelve to
twenty pounds at the second application.
"TLe most favorable hours tor apply.
ing sulphur are from or 0 o'clock in
the morning to the middle of the after.
noon, preferably from A. NJ. till 2 P. NJ
The sulphur which comes in contact
with dew or other water is in no wise
altered thereby, but ceases to give of
its vapcr only until the water evapo-
rates, and thereby exposes It's surface to
the atmosphere. A rain following the
application of sulphur does not alter this
element, but results in damage only in
removing the particles mechanically
from the foliage of the vine 10 other
places more remote from the seat of
disease.
| WINDY DAYS To BE AVOIDED.
"Any wind other than very gentle
will do much to shake off and remove
the sulphur from the leaves. A windy
day should therefore be avoided. Iu
fact, a hot, still midday is best in ali
respects as amply proven by the strong
odor of sulphur prevailing at the time of
such an application,
..Iu purchasing sulphur its quality
| oul roax- hesf ha 1eiarp,ip ad
by the use of the microscope. The
weight of given bulk will establish
the relative 6neness, but cannot be
used in comparing sublimed with ground,
as the mechanical condition of the
two are different-sublimed sulphur is
in beaded strings, and occupies more
space than ground sulphur, much as
shavings are Of greater bulk than saw
dust. 70 persons experienced in its use,
the fneness may be determined by the
feeling almost impalpable it should be.
I have never known this sulphur adul-
terated, although ground sulphur is fire.
quently added to the sublimed to enable
the merchant to sell it cheaper. All
samples Of Eastern sablimed sulphur ex.
amined ] haue found mixed in this
manner, showing that the credit of
ground sulphur has sometimes been un.
consciously extended to the so.cslled
and more expensive sublimed.
"Where the question Of purity or fine
ness arises with any vineyordist, samples
may be sent to this office, where a
prompt determination will be made and
reported without cost to the applicant.
Ground sulphur may be easily distin.
guishei from sublimed by the differ
enee in color, the latter always shows
more yellow, the former more white or
light tint of yellow. ."-[Bulletin.